At this point each chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.
此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.
The tetrads eventually shrivel or are resorbed.
这种四分体最终萎缩或被再吸收.
As a result, dyad spores formed.
结果形成二分体孢子.
The cells of the quadrant in turn become partitioned to from the eight - celled embryo.
四分体细胞于是分裂形成八细胞胚.
Company's main products are: Siamese. Diverging . Taipen - optical composition of glass.
公司主要产品有: 连体. 分体.清 光组合 玻璃台盆.
SPMs of 24 Yili horses were measured in the Urumchi equestrianism club.
本文采用体尺细分法,测定了乌鲁木齐马术俱乐部24匹伊犁马19个细分体尺及1000m速度成绩.
On June 19, artificial ports were shipped to the coast of Normandy.
它们是在英国用混凝土分体浇注技术建造的,由两部分组成:混凝土沉箱和浮动码头.
Microspore abortion occurred after the tetrad formation.
小孢子败育发生在四分体形成以后.
To prove whether or not the fissile spiral type artificial head replacement conforms to biomechanics principles.
目的:论证分体螺旋式人工股骨头置换的合理性.
It had snow - melting - like veins on the surface of pollen grain with several hollows.
萌发孔沟多为3对(顶分体3条,侧分体各对应1条),以四面体几何中轴为中心,中心对称分布于四面体的3个侧面.
Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
大孢子四分体为线形, 合点端功能大孢子发育成为蓼型胚囊.
Cytokinesis was simultaneous and the arrangement of microspores in the tetrad was tetrahedral.
胞质分裂为同时型,四分体中小孢子排列呈正四面体形.
Birdbath bibcock has the branch of fission, monomer, you can be used according to actual condition.
水盆龙头有分体 、 单体之分, 您可根据实际情况采用.
Super - microspore happened in the 5 % ~30 % or more tetrads and its formation was directly concerned with B - chromosome.
四分体中额外小孢子的形成与B - 染色体直接有关,其频率为5%～30%或更高.
The tapetum begins to vary at the stage of tetrad with the cytoplasm anther cell.
小孢子孢原为多细胞,小孢子母细胞减数分裂产生四面体型的小孢子四分体.